EP1875548A1 - BATTERIE RECHARGEABLE AU LITHIUM AYANT UN EXCES DE CATHODE A BASE DE LiFePO4 PAR RAPPORT A UNE ANODE A BASE DE Li4Ti5O12 - Google Patents

BATTERIE RECHARGEABLE AU LITHIUM AYANT UN EXCES DE CATHODE A BASE DE LiFePO4 PAR RAPPORT A UNE ANODE A BASE DE Li4Ti5O12

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Publication number
EP1875548A1
EP1875548A1 EP06741390A EP06741390A EP1875548A1 EP 1875548 A1 EP1875548 A1 EP 1875548A1 EP 06741390 A EP06741390 A EP 06741390A EP 06741390 A EP06741390 A EP 06741390A EP 1875548 A1 EP1875548 A1 EP 1875548A1
Authority
EP
European Patent Office
Prior art keywords
lithium rechargeable
rechargeable battery
anode
electrolyte
excess
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06741390A
Other languages
German (de)
English (en)
Other versions
EP1875548A4 (fr
Inventor
Alain Vallee
Patrick Leblanc
Martin Beauparlant
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bathium Canada Inc
Original Assignee
Avestor LP
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Avestor LP filed Critical Avestor LP
Publication of EP1875548A1 publication Critical patent/EP1875548A1/fr
Publication of EP1875548A4 publication Critical patent/EP1875548A4/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0565—Polymeric materials, e.g. gel-type or solid-type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0568—Liquid materials characterised by the solutes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/136—Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/523—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron for non-aqueous cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M2010/4292—Aspects relating to capacity ratio of electrodes/electrolyte or anode/cathode
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2300/00—Electrolytes
    • H01M2300/0085—Immobilising or gelification of electrolyte
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • Lithium rechargeable cell having an excess of LiFePO 4 based cathode relative to a Li 4 Ti 5 O 12 based anode
  • the present invention relates generally to Lithium rechargeable batteries and, more particularly, to Lithium rechargeable batteries optimized for large format batteries and long cycle life.
  • Lithium batteries comprising Lithium Titanium Oxide, Li 4 Ti 5 012, as anode or negative electrode material and Lithium Iron Phosphate, LiFeP ⁇ 4, as cathode (or positive electrode) material have recently emerged as a promising candidate for Electric or Hybrid vehicles as well as stationary applications and power tools.
  • This specific couple of electrode materials provides long cycle stability, environment compatibility (low toxicity) and low cost with appreciable capacity values for a broad range of discharge rates.
  • Li4Ti 5 Oi2 has a spinal-type structure where the electrochemical process involves the reversible insertion of lithium ions occurring at a stable voltage of approximately 1.55 V vs. Li -(/Li at 25 0 C.
  • LiFeP ⁇ 4 has an olivine structure where the electrochemical process involves the reversible insertion-extraction of lithium ions also occurring at a flat voltage plateau of about 3.45V vs. Li -I/Li at 25 0 C. Because the voltage difference between the anode and cathode material operate within the stability window of most electrolytes, the electrolyte is not likely to react with the anode or cathode active materials and the battery is expected to be safe and to have an inherently high cycling life.
  • One of the remaining obstacles to the longevity of this electrode combination is the potential degradation of the LiFeP ⁇ 4 cathode material under condition of over-discharge that may occur if the battery is not equipped with an electronic protection that shuts down the battery when an over-discharge condition occurs.
  • a battery which comprises a plurality of cells connected in series or parallel may have one of its cells reaching the over-discharge state prematurely which is undetected by the electronic protection device and the LiFeP ⁇ 4 cathode material of that particular cell may be permanently damaged if it reaches and exceeds its phase change voltage point under prolonged over-discharge conditions.
  • a particular cell of a battery comprising a plurality of cells connected in series falls into an over-discharge condition, that particular cell may reverse its polarity through the continued current discharge of the other cells and either oxidize or reduce the electrolyte thereby degrading it to a point where that particular cell is permanently damaged which will affect the overall longevity and performance of the battery.
  • LiFePCU cathode material and Li4Ti5 ⁇ i2 anode material designed with a safety mechanism that prevents degradation of the battery in an over-discharge state.
  • the present invention seeks to provide a safe large format lithium ion rechargeable battery based on LiFePCU cathode material and Li4TisOi2 anode material having a long cycle life.
  • the invention seeks to provide a lithium ion rechargeable battery comprising at least one electrochemical cell, each electrochemical cell comprising an anode of Li 4 Ti 5 On type, a cathode of LiFeP ⁇ 4 type and an electrolyte separating the anode from the cathode, wherein the electrochemical cell comprises an excess of LiFeP ⁇ 4 cathode material relative to the Li4TisOi2 anode material to prevent permanently damaging the electrochemical cell in an over-discharge condition.
  • Figure 1 is a diagram illustrating the discharge curves of an electrochemical cell (Bl) comprising an LiFeP ⁇ 4 based cathode (Fl) and an Li4TisOi2 based anode (Tl), the electrochemical cell having an excess of LiFeP ⁇ 4 cathode material
  • Figure 2 is a schematic view of a lithium battery comprising a plurality of electrochemical cells connected in series.
  • Figure 1 illustrates the discharge behavior of an LiFeP ⁇ 4 based cathode material combined to an Li4TisOi2 based anode material in an electrochemical cell with the theoretical voltage stability window of the electrolyte separator positioned between the LiFeP ⁇ 4 cathode and the Li4TisOi2 anode represented in doted lines.
  • the electrolyte separator may be a liquid or gelled soaked in a microporous separator.
  • the electrolyte is also present in the LiFeP ⁇ 4 cathode and the Li4TisOi2 anode.
  • the LiFeP ⁇ 4 cathode material discharge curve Fl has its plateau around 3.4 V vs Li-f/Li which is below the upper limit of the stability window of the electrolyte separator used.
  • the Li4TisOi2 anode material discharge curve Tl has its plateau around 1.5 V vs Li-+/Li which is above the lower limit of the stability window of the electrolyte separator used.
  • the electrochemical cell corresponding to and represented by the discharge curve B 1 illustrated in Figure 1 is designed with an excess LiFeP ⁇ 4 cathode material relative to the Li4TisOi2 anode such that in over-discharge conditions, it is the oxidation of the Li4TisOi2 anode that will be exhausted first thereby preventing the LiFeP ⁇ 4 cathode material from reaching the steep reduction slope R which is exothermic and further reaching the second plateau P2 of the LiFeP ⁇ 4 cathode material that marks an irreversible phase change of the LiFeP ⁇ 4 cathode material which causes permanent capacity loss of the electrochemical cell.
  • the electrochemical cell is preferably designed with a 5% excess of LiFeP ⁇ 4 cathode material relative to the Li4TisOi2 anode.
  • the electrochemical cell may be designed with a 10% excess of LiFeP ⁇ 4 cathode material relative to the Li4TisOi2 anode for added safety and even as much as 20% excess of LiFeP ⁇ 4 cathode material relative to the Li4TisOi2 anode for increased safety.
  • the discharge cut-off theoretically occurs when the potential difference of the electrochemical cell (Bl) reaches about 0 Volt vs Li-»/Li thereby maintaining the voltage at the surface of the Li4Ti5 ⁇ i2 anode and at the surface of the LiFeP ⁇ 4 cathode of the cell within the stability window of the electrolyte used.
  • electrochemical cell 12 comprises an excess of LiFeP ⁇ 4 cathode material relative to the Li 4 Ti 5 Oo anode
  • the Li4TisOi2 anode will continue to oxidize until it is exhausted and its surface will eventually reach a voltage outside the stability window of the electrolyte where the solvent in the electrolyte begins to oxidize at the surface of the Li4Ti 5 Oi2 anode whereas the LiFePCk cathode material remains stable on its initial discharge plateau Pl .
  • the solvent portion of the electrolyte will undergo oxidation at the surface of the Li4TisOi2 anode until the sum of the voltages of the series of electrochemical cells reaches the overall discharge cut-off voltage.
  • the surface area of the Li4TisOi2 anode is relatively small and the solvent contained in the electrolyte oxidizes slowly thereby generating a limited amount of heat and gas and only partially degrading the electrolyte.
  • the oxidized electrolyte having been partially degraded remains operational for further cycles, has generated limited amount of heat and gas and the LiFePCh cathode material has been spares from potential harmful reduction.
  • a simple venting system is preferably used on the casing of the battery as is well in the art which may easily manage the low pressure and temperature evolution resulting from the solvent oxidation at the surface of the Li4Ti5 ⁇ i2 anode as compared to the sophisticated venting systems used in typical Li-ion cells where pressure and temperature increase rapidly and may lead to failure.
  • FIG. 2 illustrates schematically, an example of a battery 10 comprising a plurality of series-connected electrochemical cells each having an LiFeP ⁇ 4 cathode, an Li4TisOi2 anode and a liquid or gelled electrolyte therebetween.
  • battery 10 is monitored by a simple electronic system that shuts off the battery when its voltage V falls below 1.0 Volts or exceeds 2.0 Volts.
  • a cell 12 may be defective and fall below the 1.0 Volt threshold while the voltage V of battery 10 remains above the 1.0 Volt threshold.
  • the individual voltage Bl of cell 12 will fall to 0 volt and the Li4Ti5 ⁇ i2 anode will oxidize until it is exhausted and the surface of the anode will reach a voltage 3.4 Volts.
  • the cell 12 inverses its polarity.
  • the excess of LiFePCh cathode material relative to the Li4Ti5 ⁇ i2 anode material prevents the simultaneous exhaustion of the cathode material.
  • the solvent in the electrolyte begins to oxidize at the surface of the Li4TisOi2 anode.
  • the solvent portion of the electrolyte will undergo oxidation at surface of the Li4TisOi2 anode until the sum of the voltages V of the series of electrochemical cells reaches the overall discharge cut-off voltage.
  • the LiFePCU cathode voltage will remain on its plateau Pl (fig.l) until its excess is consume thereby providing an important buffer to protect itself and the cell 12 in over-discharge against potential exothermic reduction once it reaches its steep reduction slope R (fig.l).
  • the electrolyte separator of the electrochemical cell configuration outlined above may be any kind of liquid or gelled electrolytes known to those skilled in the art that comprise an alkali metal salt and a aprotic solvent and/or a polar solvent and optionally a polymer.
  • the electrolyte may also be an ionic liquid or a liquid salt having a stability window comprised between 1.0 Volts or lower and 3.7 Volts and higher.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Materials Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Secondary Cells (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Cell Separators (AREA)

Abstract

L’invention décrit une batterie rechargeable au lithium comprenant une série de cellules électrochimiques ayant chacune une anode à base de Li4Ti5O12, une cathode à base de LiFePO4, un électrolyte et un séparateur placé entre l’anode et la cathode. Chacune desdites cellules comprend un excès de cathode à base de LiFePO4 par rapport à l’anode à base de Li4Ti5012, de manière à éviter un endommagement irréversible desdites cellules lors d’une décharge excessive.
EP06741390A 2005-04-15 2006-04-13 BATTERIE RECHARGEABLE AU LITHIUM AYANT UN EXCES DE CATHODE A BASE DE LiFePO4 PAR RAPPORT A UNE ANODE A BASE DE Li4Ti5O12 Withdrawn EP1875548A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67148605P 2005-04-15 2005-04-15
PCT/CA2006/000599 WO2006108302A1 (fr) 2005-04-15 2006-04-13 BATTERIE RECHARGEABLE AU LITHIUM AYANT UN EXCES DE CATHODE A BASE DE LiFePO4 PAR RAPPORT A UNE ANODE A BASE DE Li4Ti5O12

Publications (2)

Publication Number Publication Date
EP1875548A1 true EP1875548A1 (fr) 2008-01-09
EP1875548A4 EP1875548A4 (fr) 2008-05-28

Family

ID=37086590

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06804613A Withdrawn EP1875535A4 (fr) 2005-04-15 2006-04-13 Batterie rechargeable de type rocking-chair au lithium
EP06741390A Withdrawn EP1875548A4 (fr) 2005-04-15 2006-04-13 BATTERIE RECHARGEABLE AU LITHIUM AYANT UN EXCES DE CATHODE A BASE DE LiFePO4 PAR RAPPORT A UNE ANODE A BASE DE Li4Ti5O12

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06804613A Withdrawn EP1875535A4 (fr) 2005-04-15 2006-04-13 Batterie rechargeable de type rocking-chair au lithium

Country Status (5)

Country Link
US (2) US20060234123A1 (fr)
EP (2) EP1875535A4 (fr)
JP (3) JP2008536272A (fr)
CA (2) CA2605867A1 (fr)
WO (2) WO2006108302A1 (fr)

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US20060234125A1 (en) 2006-10-19
US20060234123A1 (en) 2006-10-19
JP2008536271A (ja) 2008-09-04
EP1875535A4 (fr) 2008-07-30
CA2605874A1 (fr) 2007-01-18
JP2013101967A (ja) 2013-05-23
EP1875548A4 (fr) 2008-05-28
CA2605867A1 (fr) 2006-10-19

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